Add option to disable async

Add no-async option to Configure that forces ASYNC_NULL.
Related to RT1979
An embedded system or replacement C library (e.g. musl or uClibc)
may not support the *context APIs that are needed for async operation.

Compiles with musl. Ran unit tests, async tests skipped as expected.

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

diff --git a/Configure b/Configure
index 77bb60c3e6c54b7b741fec153b6e9f60d024135a..56fa31a079a84dbe8b43fc0e3ef0d2bde6ffafc8 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -227,6 +227,7 @@ my @dtls = qw(dtls1 dtls1_2);
 my @disablables = (
     "aes",
     "asm",
+    "async",
     "bf",
     "camellia",
     "capieng",
@@ -741,7 +742,7 @@ foreach (sort (keys %disabled))
                my ($ALGO, $algo);
                ($ALGO = $algo = $_) =~ tr/[\-a-z]/[_A-Z]/;
 
-               if (/^asm$/ || /^err$/ || /^hw$/ || /^hw-/)
+               if (/^asm$/ || /^err$/ || /^hw$/ || /^hw-/ || /^async$/)
                        {
                        push @{$config{openssl_other_defines}}, "OPENSSL_NO_$ALGO";
                        print " OPENSSL_NO_$ALGO";

diff --git a/crypto/async/arch/async_posix.h b/crypto/async/arch/async_posix.h
index 6cc313e16a2e5531abc16e8041a6f14f6d830958..85d033f8516076e5e843678859f35885265f819d 100644 (file)
--- a/crypto/async/arch/async_posix.h
+++ b/crypto/async/arch/async_posix.h
@@ -53,7 +53,7 @@
 #define OPENSSL_ASYNC_ARCH_ASYNC_POSIX_H
 #include <openssl/e_os2.h>
 
-#if (defined(OPENSSL_SYS_UNIX) || defined(OPENSSL_SYS_CYGWIN)) && defined(OPENSSL_THREADS)
+#if (defined(OPENSSL_SYS_UNIX) || defined(OPENSSL_SYS_CYGWIN)) && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC)
 
 # include <unistd.h>
 

diff --git a/crypto/async/arch/async_win.h b/crypto/async/arch/async_win.h
index d2054bf665c1ffc778adce7a08235e33e167018f..fa345cb1f77a9ebb97eba4eafa216755271398e8 100644 (file)
--- a/crypto/async/arch/async_win.h
+++ b/crypto/async/arch/async_win.h
@@ -54,7 +54,7 @@
  * This is the same detection used in cryptlib to set up the thread local
  * storage that we depend on, so just copy that
  */
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(OPENSSL_NO_ASYNC)
 #include <openssl/async.h>
 # define ASYNC_WIN
 # define ASYNC_ARCH

diff --git a/util/mk1mf.pl b/util/mk1mf.pl
index 1f9bdf47b74febff1b9d0c10372f1fcf9ff0ec70..ed1d0e195999b661208d7018552d2e09fcf78ef4 100755 (executable)
--- a/util/mk1mf.pl
+++ b/util/mk1mf.pl
@@ -142,6 +142,7 @@ and [options] can be one of
        no-engine                               - No engine
        no-egd                                  - No EGD
        no-hw                                   - No hw
+       no-async                                - No Async (use NULL)
        nasm                                    - Use NASM for x86 asm
        nw-nasm                                 - Use NASM x86 asm for NetWare
        nw-mwasm                                - Use Metrowerks x86 asm for NetWare
@@ -296,6 +297,7 @@ $cflags.=" -DOPENSSL_NO_EC"   if $no_ec;
 $cflags.=" -DOPENSSL_NO_GOST" if $no_gost;
 $cflags.=" -DOPENSSL_NO_ENGINE"   if $no_engine;
 $cflags.=" -DOPENSSL_NO_HW"   if $no_hw;
+$cflags.=" -DOPENSSL_NO_ASYNC" if $no_async;
 $cflags.=" -DOPENSSL_FIPS"    if $fips;
 $cflags.=" -DOPENSSL_NO_JPAKE"    if $no_jpake;
 $cflags.=" -DOPENSSL_NO_EC2M"    if $no_ec2m;
@@ -1411,6 +1413,7 @@ sub read_options
                "no-engine" => \$no_engine,
                "no-egd" => 0,
                "no-hw" => \$no_hw,
+               "no-async" => \$no_async,
                "just-ssl" =>
                        [\$no_rc2, \$no_idea, \$no_des, \$no_bf, \$no_cast,
                          \$no_md2, \$no_mdc2, \$no_dsa, \$no_dh,